Unsure of your meaning of authenticated. If you are looking for information on the age and who made it, your best routes will be to visit an on-line firearms forum, post a full description, including all markings and photos of your gun. You might also visit a local gun show, where collectors may be able to offer some information.
This gun was made in 1948
gun shop, gun show, want ad, pawn shop
Gun show or on line auction or old gun catalogs
BAYARD/ PIPER IS AN OLD BELGIUM GUN MAKER, IF ITS A 12 GAUGE BORE ITS A SHOTGUN AND WORTH ABOUT $150
Royal Gun Works was a trade name on shotguns made by Anciens Etablissments Pieper in Belgium from 1905 to 1957.
First, it is not a machine gun, regardless of how it is marked. Second, most likely made around the turn of the century.
Impossible to answer without a DETAILED description of ALL markings, condition, accessories, etc..
Try the library and old gun catalogs.
$150 to 200 bucks is about it.
You have to be 18yo to do this in Belgium
I have a 16 ga DB shotgun by J,H Friese, It is perhaps 70-80 years old and was brought from Europe after WWII by my father. He got the gun in Belgium in 1945. I too am searching for more info on Friese firearms. If you can share info, I d help in my search.
THIS IS AN OLD BELGIUM GUN COMPANY, WHO NEVER USED SERIAL NUMBERS AS THEY WERE NOT REQUIRED, PROOF MARKS MAY DATE THEM A BIT.